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Property Plant and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Property, Plant, and Equipment Disclosure [Line Items]
Lease term			30 years
Property, plant and equipment, pledged for short-term bank loans	$ 10,009,274		$ 10,009,274		$ 10,646,244
Depreciation and amortization of property, plant and equipment	$ 2,091,447	$ 1,104,154	$ 4,050,749	$ 2,189,099
Land Use Rights
Property, Plant, and Equipment Disclosure [Line Items]
Lease term			50 years
Number of Land use rights on state-owned land			2
Land Use Rights One
Property, Plant, and Equipment Disclosure [Line Items]
Lease expiration year			2053
Land Use Rights Two
Property, Plant, and Equipment Disclosure [Line Items]
Lease expiration year			2061

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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